Don't turn your back on calcium continue…

You may even be at greater risk if you consider the other factors that contribute to osteoporosis:

• The decline in oestrogen. Up to half of women over the age of 45 have some degree of type 1 osteoporosis (bone loss is most profound during the first decade after menopause).
• Smoking. It suppresses the activity of the osteoblasts (the bone-building cells) and also causes changes in oestrogen metabolism in women, resulting in an earlier menopause.
• Being thin and/or fine-boned.
• Excessive use of alcohol. This reduces calcium absorption and damages liver and bone cells.
• Avery high intake of protein increases the amount of calcium lost by the body. Veganism. Avoiding all animal products means avoiding some of the richest sources of calcium.
• Lack of exercise. Physical inactivity or prolonged bed rest are associated with the loss of bone density. Astronauts experience noticeable bone loss when in space, due to the effects of weightlessness.
• Excessive, long-term use of salt, in addition to being bad for your health in general, leads to increased calcium loss from your bones.
• Pregnancy and lactation. If there is insufficient calcium in your diet while you are pregnant or breasffeeding, calcium will be drawn from your bones and teeth to provide for the growth of the baby.
• Little or no exposure to the sun. Housebound people, elderly folk and office workers often don't enjoy enough sunlight to assist their skins in the manufacture of vitamin D, which is needed for the absorption of calcium from the gastro-intestinal tract.
• Unbalanced diets. Not only quick-fix slimming diets are low in nutrients. Our average, modern-day diets often lead to an insufficient intake of nutrients. Although you might be taking in sufficient calcium-rich foods (like cheese!), you might be taking in too little of the other bone-fortifying nutrients such as vitamin D, magnesium (soy, dried beans, nuts), zinc (chicken heart and liver, beef liver, lamb), copper, manganese and boron, found in a large variety of other foods.
• Genetic inheritance accounts for 80% of the variance in peak bone mass. Blacks have a higher bone mass than whites and Asians, and men have a higher bone density than women. A strong family history is a risk factor for osteoporosis - daughters of women with osteoporosis have been shown to have lower-than-expected bone density.
• Certain health conditions such as diabetes, rheumatoid arthritis, Cushing's syndrome, amenorrhoea resulting from anorexia nervosa and/or excessive exercise, gastrectomy, immobilising diseases, male hypogonadism (low testosterone levels), chronic liver disease or malabsorption.
• Consumption of large amounts of black coffee over a long period of time.
• Hyperthyroidism and over-treatment with thyroxin.
• The prolonged use of drugs such as corticosteroids (cortisone).

What is the role of calcium in theJody?

Everyone knows that calcium is required for healthy bones and teeth, but most people believe that calcium is only important in childhood. Wrong! There is a need for calcium throughout one's life in order to build and maintain calcium levels in bone.

Calcium acts as a metabolic regulator. Changes in the level of calcium within the cell result in the switching on and off of the processes of muscle contraction and nerve excitation.

Calcium is also involved as a co-factor in many enzyme processes. It is needed in cell division, the immune system and is also required in order for blood to clot.

More recently there has been some evidence to suggest that calcium has a positive role to play in maintaining a healthy blood pressure.

Clearly, calcium is an essential nutrient and a major role player in our general wellbeing; good health being an essential prerequisite for shedding weight successfully and permanently.

Dietary sources of calcium

The major foods in the diet that contain calcium, include milk, cheese, yoghurt, white bread, white flour, and green vegetables. The absorption of calcium by the body is dependent on many factors, including the form of calcium in the food. The best sources of available calcium are dairy foods. Green vegetables and whole grain cereals contain phytates that bind calcium and prevent absorption.

A balanced diet is important for the provision of calcium and other bone fortifying nutrients throughout your life.

Making the most of meat

Meat only poses two possible threats, namely its visible fat and the fact that too much of any good thing is .... well, not much good. Eating too much meat means you are eating too much saturated fat, absorbing too many unwanted fat kilojoules and pushing your protein intake through the roof.

Enjoyed in moderation though, lean red meat (with all visible fat removed) is quite a bright star in the nutrient skies. It is rich in potassium, B vitamins, zinc and iron and an excellent source of protein. Served in small, lean portions with the addition of dietary fibre, red meat will enhance your health rather than harm it.

Fibre, as found in grains, dried beans and vegetables, helps to fight heart disease, digestive disorders and certain types of cancer. These foods, when served with meat, will assist your body in coping with the hidden fats in the meat. Fibre-rich foods will also help you feel satisfied faster and for longer - an excellent way in which to help you control your meat intake and so too, those unwanted fat kilojoules.

You can make some clever cuts in your meat consumption, and I am not referring to cutting it out. I mean buying and eating cuts that contain less of the hidden fats (often called the marble fat) and cholesterol-causing saturated fat. Be 'pound' wise and buy clever cuts. Those are the hind-quarter cuts such as fillet, rump, topside and leg of lamb. They contain the least hidden fats. However, even after the visible fat has been removed, you'd be surprised to know how much fat is hidden in what you deem 'pure' meat.

The cooking method also dictates how much fat you will eventually consume. Red meat actually loses weight during cooking or grilling on a rack, and depending on the period of time for which the meat is exposed to the heat, between 7 and 23% of the fat could drip away. That is provided of course you don't consume the pan drippings! With stews and casseroles, in which the fat becomes part of the sauce, no dripping away of fat takes place and it seeps into the cooking liquids. Those you end up eating by way of the gravy or a sauce. And needless to say, frying meat in fat or oil obviously adds even more fat (and unwanted) kilojoules to your unsuspecting body - rather a stupid thing to do if you want to be lean and healthy. So consider your cut and its cooking method with great care if you care about your weight.

Best of all course, is to go wild. it you enjoy red meat, 'have venison often. A very large serving of grilled game steak (300 g) will only add a humble 9,6 g of fat to your intake, whereas a similar serving of grilled beef steak (rump, fat removed) could add as much as 30 g of fat.

Similarly, if you enjoy poultry, be game for game. Ostrich, pheasant and quail are ultra-lean and 300 g of roast game will only provide you with about 10,5 g of fat. On the other hand, if you roasted (with the skin intact) and consumed its domesticated counterpart the chicken, the exact same size of serving will happily lay in the region of 39 g of fat on your body.

Be cautioned, though; game and venison tend to be dry - as a result of their low fat content - so don't defeat the whole object by adding buffer, oil, bacon, lard or cream to the dish. Use wine, fruit and stocks instead to moisten the meat. As for a sauce or gravy, the stock of game or venison is delightfully robust in flavour. Reduce your cooking liquid by boiling it rapidly with garlic, aromatic peppercorns and herbs until richly brown and thickened to your liking. A wiser, leaner and more nourishing bet than a creamy sauce, for sure.

Don't inhibit your^- nutrients

There is no point in trying to follow a healthy diet if you are not aware of the fact that the absorption of certain nutrients can be inhibited. In other words, their assimilation and uptake by the body can be hindered by some or other bad food combination with nutrient inhibitors.

The nutrients most at risk are calcium and iron. Thus, try not to consume calcium-rich foods with alcohol, high-fibre cereals or red meats - they restrict the absorption of calcium. This means for example, that it is not wise to combine cheese and wine or cereal and milk. Serve wine with low-fat meat, chicken, fish, fruit and vegetable snacks and your cereal with fruit juice instead of milk. Vitamin D, however, aids the absorption of calcium. As sunlight is an excellent way to improve your vitamin D levels, serve lean, fruity milkshakes around your pool instead of fruit juices. That way your body will benefit fully from your clever combinations.

The absorption of iron is hampered by the simultaneous intake of tea, red wine and high-fibre cereals, so don't serve, say, iron-rich liver with whole wheat bread or brown rice, Rather serve it with potatoes or white rice. On the other hand, foods rich in vitamin C assist in the absorption of non-heam iron (iron derived from vegetables), so combine those foods for optimum nutrition. For instance, a salad made from iron-rich spinach, vitamin C-rich tomatoes and sweet peppers would be an excellent choice for super-A nutrient absorption without any threat of inhibitors.